Modeling the Luminance Distribution of 3-D Object Surface with Specular Reflection Component and Shape Measurement

概要

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A method is described for reducing the large error that often occurs in the measurement of three-dimensional (3D) objects using the photometric stereo method when there is a specular component in the reflection characteristics of the object's surface. First, the change in the luminance distribution caused by the component is estimated based on the correlation between the modeled distribution and a gray-level image of the object, created by numerical experiment Next the shape measurement of the hemisphere object was carried out Numerical experiment of three dimensional measurement of a hemispherical object showed that the mean error of normal vector can be reduced by as much as 90%. This method is applicable to machine vision, automatic manufacturing, and other industrial processes.
社団法人照明学会の論文